Fai's apartment in east Bangkok was relaxing, comfortable and super convenient. It is not in a tourist area. It is right off the airport rail link so you don't have to take a taxi to get to it and can take the rail link into town! We never took a single cab while we were there. Also, there is a Max Value and 7/11 just down stairs so anything you forgot and need you can buy there! South of the apartment about half a mile is excellent street food and a coffee shop. It's a good way to see authentic local life.
The space itself is quiet and calm. It's a basic space but the shower works well, has a microwave and a pot to boil water and the building itself is super safe (door security, keycard access, etc...) view from bedroom is great and the air condoning works super well! That's important because Bangkok is hot!
If you don't mind taking the train into town then I would definitely recommend this room if you're looking for your own quiet place outside of the tourist area of Bangkok. My boyfriend and I spent 6 days here and we loved it.